At the crossroads of motoring, fashion and sport, the Citroën Lacoste concept is a “shared vision of boldness, creativity and optimism” between the French brands, according to the pre-Paris press release. At first glance, the Citroën Lacoste concept appears to be a very optimistic car indeed, as it doesn't have a roof to mitigate the inevitability of a bleak French winter. In fact, the Citroën Lacoste has an auto-inflatable hood that deploys along the roof backbone to form a bright yellow soft-top roof in what is apparently quite a spectacular transformation. Sadly, the press kit doesn't have any pics of the roof deployed.